linux-kernel - Re: [PATCH] x86/signal: Deinline get

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Date:	Mon, 28 Sep 2015 05:33:53 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Denys Vlasenko <dvlasenk@...hat.com>,
	Ingo Molnar <mingo@...nel.org>
CC:	Andy Lutomirski <luto@...capital.net>,
	Borislav Petkov <bp@...en8.de>,
	Brian Gerst <brgerst@...il.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/signal: Deinline get_sigframe, save 240 bytes

This one makes me slightly nervous, because it isn't clear that these aren't potentially performance sensitive.

On September 28, 2015 5:23:57 AM PDT, Denys Vlasenko <dvlasenk@...hat.com> wrote:
>This function compiles to 277 bytes of machine code and has 4
>callsites.
>
>Signed-off-by: Denys Vlasenko <dvlasenk@...hat.com>
>CC: Ingo Molnar <mingo@...nel.org>
>CC: Andy Lutomirski <luto@...capital.net>
>CC: "H. Peter Anvin" <hpa@...or.com>
>CC: Borislav Petkov <bp@...en8.de>
>CC: Brian Gerst <brgerst@...il.com>
>CC: x86@...nel.org
>CC: linux-kernel@...r.kernel.org
>---
> arch/x86/kernel/signal.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
>index da52e6b..054a4d0 100644
>--- a/arch/x86/kernel/signal.c
>+++ b/arch/x86/kernel/signal.c
>@@ -196,7 +196,7 @@ static unsigned long align_sigframe(unsigned long
>sp)
> 	return sp;
> }
> 
>-static inline void __user *
>+static void __user *
>get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t
>frame_size,
> 	     void __user **fpstate)
> {

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